Active Standard ASTM D4969 | Developed by Subcommittee: D20.15
Book of Standards Volume: 08.02
Historical (view previous versions of standard)
This specification covers glass fabric impregnated, coated, and sintered on both sides with PTFE to a specified maximum nominal thickness. It does not pertain to structural fabric, single-sided PTFE coatings, or materials used for laminates. The PTFE-coated glass fabric is for electrical, chemical, and mechanical uses. The base material used in the manufacture of the products of this specification shall be a woven glass fabric. The glass fabric is impregnated or coated with polytetrafluoroethylene. When necessary, additives are used to aid the dispersion to achieve the required properties and performance of the final product. The glass fabric shall be tested for color, thickness, breaking strength, edge tear, conductivity, percent PTFE, smoothness, and porosity.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers glass fabric impregnated, coated, and sintered on both sides with PTFE to a nominal thickness of 0.318 mm (0.015 in.) or less.
1.2 The PTFE-coated glass fabric is for electrical, chemical, and mechanical uses.
1.3 The PTFE-coated glass fabric of this specification does not pertain to structural fabric, single-sided PTFE coatings, or materials used for laminates.
Note 1—There is no ISO standard that covers information included in this specification. The dielectric test is mentioned in ISO 12086-2 and ISO 13000–1 and 2.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D123 Terminology Relating to Textiles
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
D257 Test Methods for DC Resistance or Conductance of Insulating Materials
D374 Test Methods for Thickness of Solid Electrical Insulation
D579 Specification for Greige Woven Glass Fabrics
D618 Practice for Conditioning Plastics for Testing
D737 Test Method for Air Permeability of Textile Fabrics
D751 Test Methods for Coated Fabrics
D883 Terminology Relating to Plastics
D902 Test Methods for Flexible Resin-Coated Glass Fabrics and Glass Fabric Tapes Used for Electrical Insulation
D1424 Test Method for Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus
D3892 Practice for Packaging/Packing of Plastics
D4441 Specification for Aqueous Dispersions of Polytetrafluoroethylene
ISO StandardISO13000–1and2 Plastics--Polytetrafluoroethylene (PTFE) Semi-Finished Products
ICS Number Code 59.080.40 (Coated fabrics)
UNSPSC Code 11162112(Coated fabrics)